So I want to buy steem, what to I do?

Folks, I need your help as an uber newbie in the cryptomarket.

So I want to buy steem, but I dont have any kind of exchange account. I press the buy steem button in the menu on the side. I automatically get redirected to the blocktrades.us site.

I receive a code with also a QR code...

So now what do I do???

Update: 3 helpfull Steemians Hive account@positivebalances Hive account@coolbowser  Hive account@willtak recommended coinbase to me, I made myself an account and transferred BTC to steem

I also read this post from Hive account@donkeypong which clarifies a lot!

Help a girl, who is thinking about the future, out here peeps!